EP2799504B1 - Method for bonding one adhesive partner with a second adhesive partner and adhesive partner or knife bearing - Google Patents

Description

The invention initially relates to a knife bearing for a food processor, with a shaft which is arranged in a receiving pot via shaft bearings, the receiving pot being provided with a cover.

Furthermore, the invention relates to a method for producing a knife bearing for a food processor, wherein a shaft is arranged in a receiving pot via shaft bearings and the receiving pot is provided with a cover.

Methods of the type in question are known. In this case, an adhesive is used to glue two components together, which, if necessary, cures targeted exposure to light. For this purpose, in the known prior art, at least one adhesive partner, in particular the adhesive partner to be penetrated by the light for curing the adhesive, is kept transparent. Such bonds often have low strength. In addition, such known methods are time-consuming, unless reactive adhesive mixtures are used.

The publication US 6 676 795 B1 discloses an adhesive bond for a wiper blade. The wiper blade consists of a steel support and an associated wiper blade element. The wiper blade element is made of a flexible plastic material, such as polyurethane. It has a diffuse translucent appearance, so that the underlying steel beam is visible through the wiper blade element and the adhesive surface. The glue point is irradiated with UV light or visible light for curing.

The publication EP 1104 793 A2 discloses a method for gluing two adhesive partners by means of a double-sided adhesive tape, a transparent coating as an adhesion promoter and gas diffusion barrier being applied to an at least partially transparent surface of a first adhesive partner made of polycarbonate, and wherein the coating cures and then the coated adhesive partner over the adhesive tape with the second Contact partner.

In view of the known prior art, a technical problem of the invention is seen in producing a knife bearing using a light-curing adhesive.

According to a first idea of the invention, a possible solution to the problem is given in a knife bearing in which the receptacle is glued to the lid by means of a light-curing adhesive and the light is cured by means of blue light, the lid being optically non-transparent, but in the sense of translucency, which is to be characterized as translucent, is formed.

A further solution relates to a method for producing a knife bearing, in which the cover is glued to the receiving pot by means of a light-curing adhesive, the light curing being carried out by means of blue light directed towards the outer surface of the cover, the cover being optically non-transparent, however is designed in the sense of light permeability, which is to be characterized as scattering translucent.

Gluing at ambient temperature or slightly above is preferred. The ambient temperature can mean, for example, a temperature within a range of 0-25 ° C. A slight increase can shift the range, for example, to 5-30 ° C, possibly also 15-40 ° C.

The adhesive connection is high-strength and enables mechanical connection elements, such as screws or the like, to be dispensed with. Furthermore, it is advantageously possible to bond high-strength adhesive partners, for example adhesive partners made of a high-strength plastic, such as polyarylamide or other hard materials. The blue light is preferably supplied through the wall of the one adhesive partner, more preferably the first adhesive partner, which is non-transparent, but in the sense of a (certain) light permeability, which is to be characterized as essentially diffusely translucent. This enables the adhesive to be evenly cured with diffusely scattered blue light. In particular, a non-curing acrylate adhesive is used as the adhesive. Blue light with a wavelength of 380 to 500 nm, more preferably 420 to 480 nm, is more preferably used here.

Further features of the invention are often explained below, also in the description of the figures, in their preferred assignment to the subject matter of claim 1 or to features of further claims. However, they can also be of importance in an assignment to only individual features of claim 1 or the respective further claim or in each case independently.

In a further preferred embodiment, it is provided that the first adhesive partner, in particular to be penetrated by the blue light, has a thickness of 0.5 to 10 mm. In connection with the non-transparent design of the first adhesive partner, this selected thickness allows diffusely scattered blue light to appear on the surface of the first adhesive partner facing away from the illuminating side.

It is further preferred that both adhesive partners are ribbed on the facing surfaces. This results in an overall enlarged adhesive surface, in particular to increase the shear strength. Radial ribbing is preferred, in particular in the case of rotationally symmetrical adhesive partners.

It is known from the prior art to bond partners, in particular manufactured from a plastic material or from other materials, in particular hard materials, according to adhesive bonding.

The invention further relates to a knife bearing for a food processor, with a shaft which is arranged in a receiving pot via shaft bearings, the receiving pot being provided with a cover.

Knife bearings of the type in question are known. These are used in particular in electrically operated kitchen machines, more particularly kitchen machines for the household sector. For example, a knife set for a mixing vessel of the food processor is held in the stirring vessel via the knife bearing, the drive of the knife set being achieved via the shaft passing through the knife bearing. In the course of assembling the knife bearing, there are different assembly steps, at least one Assembly step a preferably non-detachable, in particular non-destructive detachable connection between two parts of the knife bearing is to be carried out.

In view of the known state of the art, a technical problem of the invention is seen in realizing a high-strength connection between two parts with respect to the adhesive partners and also with respect to the knife bearing without great expenditure of time.

In the case of a knife bearing, a possible solution to the task according to a first inventive idea is given in that the receptacle is glued to the cover by means of a light-curing adhesive and that the light is cured by means of blue light.

As a result of the proposed solution, a high-strength adhesive bond is achieved between the adhesive partners or between the receptacle and the lid. This is further preferred in a shorter time compared to the known adhesive techniques, this in particular without significant temperature increase or a complex mixing technique with regard to the adhesive.

The blue light is preferably supplied through the wall of the one adhesive partner or the cover, more preferably the first adhesive partner. In particular, a non-curing acrylate adhesive is used as the adhesive. Blue light with a wavelength of 380 to 500 nm, more preferably 420 to 480 nm, is more preferably used here.

Further features of the invention are below, also in the description of the figures, often in their preferred assignment to the subject matter of the claim 4 or further independent claim 5 or explained to the features of further claims. However, they can also be of importance in an assignment to only individual features of claim 4 or the further independent claim 5 or the respective further claim or in each case independently.

In a further preferred embodiment, it is provided that the first adhesive partner or the cover is optically non-transparent, but there is a certain translucency, preferably such that there is a scattering translucency. This enables the adhesive to be cured evenly with diffusely scattered blue light.

The first adhesive partner or the cover preferably also has a thickness of 0.5 to 10 mm. In connection with the non-transparent design of the first adhesive partner, this selected thickness allows diffusely scattered blue light to appear on the surface of the first adhesive partner facing away from the illuminating side.

In particular, in order to enlarge the effective adhesive area, it is further preferred that the first adhesive partner or the lid and the second adhesive partner or the receptacle are ribbed on the facing surfaces. This results in an overall enlarged adhesive surface, in particular to increase the shear strength. Radial ribbing is preferred, in particular in the case of rotationally symmetrical adhesive partners.

Fig. 1

in Schnittdarstellung zwei Klebepartner in Form eines Aufnahmetopfes für ein Messerlager und eines Deckels;

Fig. 2

eine der Figur 1 entsprechende Schnittdarstellung, die Verbindungssituation von Deckel und Aufnahmetopf betreffend.

The invention is explained below with reference to the accompanying drawing, which represents only one exemplary embodiment. The drawing shows:

Fig. 1

in sectional view two adhesive partners in the form of a receiving pot for a knife bearing and a cover;

Fig. 2

one of the Figure 1 Corresponding sectional view regarding the connection situation of the lid and the receptacle.

Is shown and described initially with reference to Figure 1 a knife bearing 1 not yet finally assembled, in particular knife bearing for a food processor.

The Messerlagerl has a shaft 2, via which, in the operating state, a knife mechanism (not shown) can be driven in a mixing vessel of the kitchen machine.

The shaft 2 is mounted in a receptacle 4 via two shaft bearings 3 spaced apart from one another in the axial direction of the shaft.

The pot interior of the receptacle 4, which receives the shaft bearings 3, can finally be covered by a cover 5, which is also penetrated by the shaft 2.

The receptacle 4 and the lid 5 are glued together, the lid 5 forming a first adhesive partner 7 and the receptacle 4 forming a second adhesive partner 6.

In a preferred embodiment, the two adhesive partners 6 and 7 or the receptacle 4 and the lid 5 consist of a highly filled one High-performance plastic, preferably made of a high-strength plastic, such as polyarylamide.

The adhesive surfaces are formed, in particular, in the region of conical surfaces of the receptacle 4 and cover 5 which are rotationally symmetrical relative to the bearing axis x. These conical surfaces 8 and 9 are furthermore ribbed in the radial direction with respect to the bearing axis x. The surfaces accordingly have grooves and ribs 10 which alternately extend in the radial direction in the circumferential direction thereof. The corresponding conical surface preferably has precisely fitting ribs 10 and grooves.

An adhesive partner, in particular the first adhesive partner 7, corresponding to the cover 5, is attached to the inside of the second adhesive partner 8, i.e. provided with an adhesive 11 in the area of its conical surface 9 and ribs 10. This is a light-curing adhesive, such as acrylic adhesive.

The adhesive 11 is further preferably distributed according to centrifugation on the circumference of the conical surface 9, the ribbing provided offering a maximum of adhesive surface, preferably in the area in which the adhesive 11 is subjected to shear when, for example, the knife bearing 1 is used.

After the first adhesive partner 7 provided with the adhesive 11 has been placed on the second adhesive partner 6, ie after the cover 5 has been placed on the receptacle 4, the adhesive partners 6 and 7 are irradiated from the outside, ie from the surface facing away from the adhesive side Blue light B performed. These are preferably light waves with a wavelength of 380 nm to 500 nm.

In particular, the lid 5, i.e. For this purpose, the first adhesive partner 7 is further preferably optically non-transparent, but preferably of the type that allows diffuse scattered blue light B to pass through to the adhesive 11 or to the adhesive surface. In this way, a very firm adhesive connection is achieved, which, moreover, takes place quickly in comparison to the known adhesive techniques, this further preferably without any appreciable temperature increase, in particular in the adhesive area.

All of the features disclosed are (in themselves) essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also included in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. In their optionally subordinate version, the subclaims characterize independent inventive developments of the prior art, in particular in order to make divisional applications on the basis of these claims.

LIST OF REFERENCE NUMBERS

1

diameter bearings

2

wave

3

shaft bearing

4

pot

5

cover

6

second adhesive partner

7

first adhesive partner

8th

conical surface

9

conical surface

10

rib

11

adhesive

x

bearing axle

B

blue light

Claims (4)

1. Blade bearing (1) for a food processor, comprising a shaft (2) which is arranged in a receptacle pot (4) via shaft bearings (3), the receptacle pot (4) being provided with a lid (5), characterised in that the receptacle pot (4) is adhesively bonded to the lid (5) by means of a light-curing adhesive (11) and in that the light curing takes place using blue light (B), the lid (5) being optically non-transparent, but in the sense of a translucency which is to be characterised as diffusing translucent.
2. Blade bearing according to claim 1, characterised in that the lid (5) has a thickness of from 0.5 to 10 mm.
3. Blade bearing according to either claim 1 or claim 2, characterised in that the lid (5) and the receptacle pot (4) are ribbed on mutually facing surfaces (8, 9).
4. Method for producing a blade bearing (1) for a food processor, a shaft being arranged (2) in a receptacle pot (4) via shaft bearings (3) and the receptacle pot (4) being provided with a lid (5), characterised in that the lid (5) is adhesively bonded to the receptacle pot (4) by means of a light-curing adhesive (11), wherein the light curing takes place using blue light (B), directed at the outer surface of the lid (5), the lid (5) being optically non-transparent, but in the sense of a translucency which is to be characterised as diffusing translucent.

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